HOLO-KROME 32294 1-8 × 3 بوصة براغي ذات رأس مقبس نقطة كوب | سبيكة فولاذ أكسيد أسود حراري (10 / عبوة)

Used these to mount a pulley on a 1/8 keyed shaft and the cup point bit in firmly without stripping. The black oxide finish looks clean and seems to resist rust well so far.

The hex socket drive seated perfectly on my allen wrench, and the cup point bit into the shaft without any slipping. These black oxide screws look clean and feel solid—exactly what I needed for a tight clamp setup.

The 3-inch length was exactly what I needed for a tight set-screw application on a shaft assembly. The black oxide finish feels durable and the cup point bites in securely without marring the surface.